405260666 has 8 divisors (see below), whose sum is σ = 608127264. Its totient is φ = 202551580.

The previous prime is 405260651. The next prime is 405260677. The reversal of 405260666 is 666062504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32720 + ... + 43371.

It is an arithmetic number, because the mean of its divisors is an integer number (76015908).

Almost surely, 2^405260666 is an apocalyptic number.

405260666 is a deficient number, since it is larger than the sum of its proper divisors (202866598).

405260666 is a wasteful number, since it uses less digits than its factorization.

405260666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78756.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 405260666 is about 20131.0870546029. The cubic root of 405260666 is about 740.0223185380.

The spelling of 405260666 in words is "four hundred five million, two hundred sixty thousand, six hundred sixty-six".